try 2.6

Geoff MacDonald · Geoff MacDonald · commit a78d8c4ae303 · 2021-04-30T18:04:29.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-rvm: 2.7.3
+rvm: 2.6
 # https://docs.travis-ci.com/user/reference/osx
 osx_image: xcode11.6
 env:
